EP0885546A1 - Systeme audio offrant de meilleures performances et pouvant etre porte sur soi - Google Patents

Systeme audio offrant de meilleures performances et pouvant etre porte sur soi

Info

Publication number
EP0885546A1
EP0885546A1 EP96917820A EP96917820A EP0885546A1 EP 0885546 A1 EP0885546 A1 EP 0885546A1 EP 96917820 A EP96917820 A EP 96917820A EP 96917820 A EP96917820 A EP 96917820A EP 0885546 A1 EP0885546 A1 EP 0885546A1
Authority
EP
European Patent Office
Prior art keywords
wearer
garment
audio system
set forth
audio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96917820A
Other languages
German (de)
English (en)
Other versions
EP0885546A4 (fr
Inventor
James H. Boyden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Interval Research Corp
Original Assignee
Interval Research Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interval Research Corp filed Critical Interval Research Corp
Publication of EP0885546A1 publication Critical patent/EP0885546A1/fr
Publication of EP0885546A4 publication Critical patent/EP0885546A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H04R5/023—Spatial or constructional arrangements of loudspeakers in a chair, pillow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/023—Transducers incorporated in garment, rucksacks or the like

Definitions

  • the present invention relates to portable entertainment and personal communication systems, particularly wearable audio systems.
  • audio output for personal use to be worn or carried near the body.
  • This audio output could be used for portable entertainment, personal communications, and the like.
  • personal and portable communication and entertainment products include, for example, cellular and portable telephones, radios, tape players, and audio portions of portable video systems and personal monitors.
  • the audio output for many of these systems is typically directed to the wearer through the use of transducers physically positioned in the ear or covering the ear, such as earphones and headphones, respectively.
  • Earphones and headphones are often uncomfortable to use for long periods of time. Also, they can block or attenuate environmental sounds causing the wearer to lose contact with the surroundings. In this regard, this can compromise safety considerations if the wearer is engaging in activities such as running, driving a vehicle or operating machinery.
  • the present invention fulfills these objects and overcomes the problems with known systems by providing a personal audio system which provides high quality sound at all audio frequencies.
  • portable speakers are provided which are wearable on the person's body and provide sounds to the ears without the necessity of actually being positioned in or covering the ears. With the present invention, transmission of lower frequencies also is enhanced.
  • the present invention utilizes one or more sealed chambers, each with two cavities, positioned to provide audio emissions to the wearer's ears.
  • the cavities are separated by a common wall on which are mounted one or more transducers whose diaphragms communicate directly with the two cavities. When the transducer is driven at acoustic frequencies, it produces acoustic pressure within the cavities.
  • one of the two cavities is sealed and the other has one or more tubular members or conduits leading from it.
  • the outer ends of the tubes are placed in close proximity to the wearer's ears.
  • conduits or tubular members are attached to each of the cavities. The tubes lead from each of the two cavities and are directed and positioned to provide audio sounds to each of the wearer's ears.
  • Another embodiment of the invention combines the tube-sampled system with separate high frequency transducers. Electrical cross-over networks separate the signal frequencies into appropriate channels. Where two conduits or tubes from opposite sides of the dual cavity are utilized, the acoustic pressure is 180° out- of-phase. In this embodiment, the acoustic radiation is in the form of a dipole, and this reduces the net radiation to bystanders.
  • the sampling chambers are preferably positioned on the torso of the wearer, such as the chest, shoulders or lapel, and are either hollow or filled with a substantially acoustically transparent material, such as open-cell foam.
  • the chambers are part of an enclosure or housing which can be conformed or made conformable to the wearer's body.
  • the enclosures or housings also can be integrated into various types of clothing, such as vests, jackets, shirts or shawls as desired.
  • FIGURE 1 illustrates one embodiment of a sample chamber in accordance with the present invention
  • FIGURE 2 illustrates another embodiment of the present invention
  • FIGURES 3-4 depict alternate possible wearable embodiments of the present invention.
  • FIGURE 5 illustrates a cross-over network for use with the present invention
  • FIGURE 6 illustrates a cross-over network for use with an alternate embodiment of the invention.
  • FIGURE 7 illustrates a portion of a cross-over network for use with a pair of sample chambers shown in Figure 1.
  • loud speaker transducers should be mounted in enclosures to confine the acoustic radiation from the rear portions or surface of the transducer so that it does not combine with the out-of- phase radiation from the front portions or surface. If the two radiations combine, a large reduction of net radiated intensity results, especially at low frequencies.
  • the combination of transducer and enclosure behaves like a high pass filter whose turnover frequency depends on several system parameters. These parameters include the free-space resonant frequency of the transducer, and the volume "V" of the sealed enclosure which acts to produce a restoring force for the diaphragm of the transducer. For small enclosures, such as those which might be worn on the body, the enclosure stiffness is likely to dominate the system. The system resonance in this region varies approximately as Vl/V and the low frequency turnover point becomes unacceptably high. For example, an enclosure whose dimensions are (10 cm) X (5 cm) X (1 cm) would produce a turnover frequency on the order of 600 Hz. Acoustical radiation below that frequency falls at a rate of 12 dB per octave for constant input. At 60 Hz, for example, the radiation is reduced by 40 db with respect to that above 600 Hz.
  • Transducers mounted on or in a sealed enclosure will exhibit resonant behavior.
  • the frequency of the resonance depends on a number of parameters, principally the free space resonant frequency of the transducer and the volume of the enclosure.
  • standard speaker enclosures and transducers cease to radiate useful acoustic power.
  • the transducer excursion for constant input continues at nominally constant amplitude. Therefore the acoustic pressure inside the enclosure can be sustained at a high level below the normal resonant frequency even though the radiated acoustic pressure is very small.
  • the low frequency response inside the enclosure is maintained well beyond the usual limit for radiated sound.
  • transducer used herein can refer to a single speaker or an array of two or more speakers.
  • FIG. 1 One embodiment for providing enhanced low frequency response for wearable speakers is shown in Figure 1 and designated by the reference numeral 10.
  • the chamber has two cavities 12 and 14 which are separated by a common wall 16.
  • One or more transducers 18 are mounted on the wall 16 and the diaphragms of the transducers communicate directly with the two cavities. When the transducer or transducers are driven at acoustic frequencies, they produce acoustic pressure within the cavities 12 and 14.
  • cavity 14 is completely sealed (except for an atmospheric pressure equalizing leak) .
  • the other cavity 12 has a tube 20 leading to the outside serving as a conduit for sampling the internal acoustic pressure.
  • the acoustic pressure is presented at the open end 22 of the tube 20.
  • One of the chambers 10 can be positioned adjacent each of the ears of the wearer.
  • the tube leading from chamber 12 can have two ends so one can be positioned adjacent each ear. This alternative is shown in phantom lines in Figure 1 with the second fork of tube 20 labeled with reference numeral 20' and the second end labeled with reference numeral 22' .
  • the chambers and tubes for the system shown in Figure 1 can be hollow.
  • the chambers and/or tubes are filled with an acoustically transparent material, such as an open-cell foam material. This particularly enables the use of soft, flexible body conforming wall materials.
  • FIG. 2 A second embodiment of the invention is shown in Figure 2.
  • the sample chamber 30 has a pair of cavities 32 and 34.
  • the cavities are separated by a common wall 36 on which one or more transducers 38 are positioned.
  • Tube 40 has an open end 42 which communicates with cavity 32.
  • Tube 44 has an open end 46 which communicates with cavity 34.
  • the ends 42 and 46 of the tubes are positioned in proximity to the ears of a wearer.
  • the transducers 38 When the transducers 38 are driven at acoustic frequencies, they produce acoustic pressure within the cavities 32 and 34. The acoustic pressure is then presented to the wearer's ears through the tubes 40 and 44.
  • the acoustic pressure will be nominally 180° out-of-phase at the ends of the tubes.
  • the acoustic radiation is in the form of a dipole (or doublet) . This reduces radiation at distances significantly larger than the separation of the dipole sources. It also reduces possible noise to bystanders, particularly at low frequencies.
  • the resonant frequency "F R " is determined to first order by the cavity volume, the length of the tube, and the diameter of the tube. At frequencies significantly below the resonant frequency, the outlet pressure in the tubes is approximately equal to the cavity pressure. There will be some attenuation, but for tubes with diameters and lengths appropriate for wearable speakers, this loss is generally negligible.
  • the tube outlet acoustic pressure for constant driver input falls at an asymptotic rate of about 6 dB per octave,modulated by resonances in the tube itself. Since the acoustic intensity is proportional to the square of the acoustic pressure, the intensity falls at about 12 lb per octave.
  • the system is designed to have a resonant frequency on the order of 100-200 Hz or higher.
  • the transducers which are employed to generate low frequencies within the chamber do not have to have a particularly low free resonant frequency.
  • the over ⁇ all efficiency of the system will be maximized when the chamber and cavities are as small as possible consistent with using a transducer or array with sufficient displacement to yield desired output acoustic pressures. Since small cavities produce high turnover frequencies, the individual transducers need only have resonant frequencies which are lower than the turnover frequency of the system. In this regard, the cavity volumes will generally dominate the determination of the resonance of the system.
  • the transducers and systems of the present invention are used to convey audio signals from various known electronic acoustical devices and convert them to audio transmitted to the wearer's ears. These devices include, for example, AM or FM radios, cassette tape players, CD players and cellular telephones.
  • the sample chambers are combined with separate high frequency transducers in an audio system.
  • the sampled chambers create a preferential transmission of the lower audio frequencies and provide satisfactory sound at all frequencies. If desired for better high frequency sounds, the additional transducers can be provided.
  • a combined system is similar to "satellite” loudspeaker systems in which a low frequency unit, often called the "woofer”, or “sub-woofer”, driven monaurally, is complemented by two high frequency units driven in stereo.
  • a system of this type is shown in Figure 3 and designated by the numeral 50.
  • the embodiment of the invention 50 is shown being worn by a wearer 52.
  • the system 50 has a single two-cavity chamber 54 configured in the form of a pendant. This is worn with a "yoke” which has within it a pair of tubes 56 and 58 integrated in the form of thin flat narrow structures. Ends 57 and 59 of tubes 56 and 58, respectively, are open and have roughly rectangular cross sections.
  • Ends 57 and 59 are positioned near the shoulder or collar of the wearer adjacent to the wearer's ears. Tube cross sections of other geometries, e.g. circular or ellipsoidal, may also be used.
  • the chamber 54 contains either a single transducer or an array of smaller transducers 55. The transducers are attached to a common wall in a manner similar to that shown above with respect to Figures 1 and 2.
  • a pair of high frequency transducers or arrays of transducers 60 and 62 are positioned at or near the open ends 57 and 59 of the system 50.
  • the transducers 60 and 62 should be oriented or pointed toward the wearer's ears for maximum efficiency. It is also possible for the high frequency transducers to be mounted in other places on the wearer's torso or garment, such as on the collar.
  • An electrical cross-over network is used to separate the signal frequencies into the appropriate channels for the system 50.
  • a representative network is shown in Figure 5.
  • any subsidiary resonances in the tubes will not have any deleterious effect because there is not any significant driving signal at those frequencies. Nevertheless, however, it is desirable to provide additional dampening or compensation of the tube resonances for increased performance.
  • the right “R” and left “L” stereo audio signals are each sent to frequency band splitters 100 and 102, respectively.
  • the right audio signals are split into a first frequency band 104 which are the lower frequency signals, and a second frequency band 106 which are the higher frequency signals.
  • the higher frequency R signals are amplified by amplifier 108 and used to drive "tweeter” speaker 110.
  • the left audio signals are split into a first frequency band 112 which are the lower frequency signals, and a second frequency band 114 which are the higher frequency signals.
  • the higher frequency L signals are amplified by amplifier 116 and used to drive "tweeter” speaker 118.
  • the R “tweeter” 110 is positioned near or adjacent to the right ear of the wearer, while the L “tweeter” 118 is positioned near or adjacent to the left ear of the wearer.
  • the two low frequency band signals 104 and 112 are combined by summer 120 and fed to amplifier 122.
  • the combined low frequency signals are then used to drive speaker or transducer 124.
  • the transducer 124 is positioned in sampling chamber 54' and the acou'stical signals are directed toward the wearer's ears by tubular members or conduits, 56' and 58' . In this manner, the wearer receives the full range of audio signal frequencies.
  • the sampling chamber is similar to chamber 30 as shown in Figure 2.
  • Figure 6 illustrates the use of a sampling chamber similar to Figure 1 with the system shown in Figure 5.
  • the R and L high frequency tweeters 110 and 118 are the same as those described above.
  • the sampling chamber 10' contains two chambers (one of which is sealed) and a forked or split tube 20, 20' which direct the audio signals to the wearer's ears by tube ends 22 and 22', respectively.
  • Another embodiment of the present invention uses enhancements to generate or improve the higher frequencies of the system. This could be accomplished by means of equalization, that is, driving the transducers harder at frequencies above the turnover or resonant frequency. Equalization may also be employed to suppress undesirable resonances.
  • FIG. 4 shows an alternate system for utilizing the present invention.
  • this system 70 two separate chamber systems 72 and 74 are provided, one for each of the ears of the wearer.
  • Chamber system 72 has a sample chamber 76 and a sample tube 78.
  • System 74 has a sample chamber 80 and a sample tube 82.
  • Each of the chamber systems 72 and 74 are two- cavity systems similar to that described above with reference to Figure 1.
  • one or more transducers are attached to a common wall separating the two chambers.
  • One of the chambers is sealed and the other is in communication with its respective tube 78 or 82.
  • the sampling tubes 78 and 82 preferably are positioned so that they are vertically parallel to the wearer's neck and in close proximity to the ears.
  • the ends 84 and 86 of the tubes 78, 82 are open allowing the acoustic pressure to be presented directly to the wearer's ears.
  • high frequency transducers 85 and 87 are positioned in the open ends 84 and 86 of the tubes 78, 82.
  • the two systems 72 and 74 are connected electronically by wires or the like (not shown) and act together.
  • This system also utilizes a cross-over network similar to that shown in Figure 6 and discussed above. However, as shown in Figure 7, the signal from the amplifier 122 is sent to the transducers in the chambers 76 and 80 of the two systems.
  • the present invention is adapted to be worn by the wearer during normal activities.
  • the systems 50 and 70 are shown as independent entities, they preferably are integrated into a wearable garment of some type, such as a vest, jacket, shirt, shawl or the like.
  • a wearable garment of some type, such as a vest, jacket, shirt, shawl or the like.
  • the open ends of the tubes of the systems 50 and 70 are preferably positioned at or near the upper edge of the collar.
  • a vest with a number of pockets or sections to hold the audio device, as well as the sample chamber or chambers and the tubular members, would provide a satisfactory garment for use of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Headphones And Earphones (AREA)

Abstract

Cette invention concerne un système (50) de communication personnel et de distraction pouvant être porté sur soi, lequel système offre un son d'une grande qualité, notamment à des fréquences audio basses, et n'arrête ni n'atténue les sons du milieu environnant. Dans un premier mode de réalisation, un transducteur ou un réseau de transducteurs (55) est disposé sur une paroi dans une chambre d'échantillonnage et entre deux cavités (54). L'une des cavités est hermétique tandis que l'autre possède un ou plusieurs conduits qui dirigent les signaux acoustiques vers une ou vers les deux oreilles de la personne portant ce système sur elle. Dans l'un ou l'autre mode de réalisation, la chambre d'échantillonnage peut éventuellement être combinée à des transducteurs à haute fréquence séparés. Dans les deux modes de réalisation, les chambres sont incorporées dans un accessoire vestimentaire tandis que les transducteurs sont connectés à une source de signaux audio.
EP96917820A 1995-06-07 1996-05-21 Systeme audio offrant de meilleures performances et pouvant etre porte sur soi Withdrawn EP0885546A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US480231 1995-06-07
US08/480,231 US5682434A (en) 1995-06-07 1995-06-07 Wearable audio system with enhanced performance
PCT/US1996/007406 WO1996041496A1 (fr) 1995-06-07 1996-05-21 Systeme audio offrant de meilleures performances et pouvant etre porte sur soi

Publications (2)

Publication Number Publication Date
EP0885546A1 true EP0885546A1 (fr) 1998-12-23
EP0885546A4 EP0885546A4 (fr) 1999-11-17

Family

ID=23907180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96917820A Withdrawn EP0885546A4 (fr) 1995-06-07 1996-05-21 Systeme audio offrant de meilleures performances et pouvant etre porte sur soi

Country Status (5)

Country Link
US (1) US5682434A (fr)
EP (1) EP0885546A4 (fr)
JP (1) JPH11506877A (fr)
AU (1) AU701453B2 (fr)
WO (1) WO1996041496A1 (fr)

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US6325507B1 (en) 2000-06-02 2001-12-04 Oakley, Inc. Eyewear retention system extending across the top of a wearer's head
US8482488B2 (en) 2004-12-22 2013-07-09 Oakley, Inc. Data input management system for wearable electronically enabled interface
US7461936B2 (en) 2000-06-02 2008-12-09 Oakley, Inc. Eyeglasses with detachable adjustable electronics module
US7013009B2 (en) 2001-06-21 2006-03-14 Oakley, Inc. Eyeglasses with wireless communication features
MXPA05001079A (es) * 2002-07-26 2005-06-03 Oakley Inc Audifonos interactivos inalambricos.
US7428429B2 (en) * 2002-08-14 2008-09-23 Sync1 Llc Hands-free personal communication device
US6934567B2 (en) * 2002-08-14 2005-08-23 Addax Sound Company Personal wearable communication and speaker system
US20060176660A1 (en) * 2005-02-07 2006-08-10 Ahmad Amiri Ultra mobile communicating computer
CN1697564A (zh) * 2005-05-13 2005-11-16 陈汝健 一种贴身式立体声便携音箱
US8139803B2 (en) * 2005-08-15 2012-03-20 Immerz, Inc. Systems and methods for haptic sound
US8111854B2 (en) 2006-11-29 2012-02-07 Yan-Ru Peng Methods and apparatus for sound production
TWI285510B (en) * 2006-01-10 2007-08-11 Gaiatek Inc Personal type leads of a sound device
WO2007105436A1 (fr) * 2006-02-28 2007-09-20 Matsushita Electric Industrial Co., Ltd. Terminal portable
WO2008076774A2 (fr) 2006-12-14 2008-06-26 Oakley, Inc. Interface audiovisuelle haute résolution pouvant être portée
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US8520883B2 (en) 2010-07-21 2013-08-27 Dennis A. Tracy Articulating speaker assembly providing for pivotal adjustment of connected first and second midrange members
US8526662B2 (en) 2010-08-05 2013-09-03 Dennis A. Tracy Articulating speaker assembly providing for pivotal adjustment of connected first and second members
US9402117B2 (en) 2011-10-19 2016-07-26 Wave Sciences, LLC Wearable directional microphone array apparatus and system
US8818013B2 (en) 2011-11-17 2014-08-26 Plastoform Industries Limited Wearable speaker system with satellite speakers and a passive radiator
EP2815266B1 (fr) 2012-02-17 2020-08-19 Oakley, Inc. Systèmes et procédés destinés à coupler amovibles un dispositif électronique et des lunettes
JP5190150B1 (ja) * 2012-07-25 2013-04-24 株式会社シマシステム スピーカユニット内蔵品
CN205177388U (zh) 2013-03-15 2016-04-20 奥克利有限公司 目镜系统
CN205691887U (zh) 2013-06-12 2016-11-16 奥克利有限公司 模块化通信系统和眼镜通信系统
US9877103B2 (en) 2014-07-18 2018-01-23 Bose Corporation Acoustic device
JP6431973B2 (ja) * 2014-07-18 2018-11-28 ボーズ・コーポレーションＢｏｓｅ Ｃｏｒｐｏｒａｔｉｏｎ 音響装置
US9736574B2 (en) * 2014-07-18 2017-08-15 Bose Corporation Acoustic device
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US11343606B2 (en) * 2015-04-10 2022-05-24 Flare Audio Technologies Limited Headphone or earphone
CN108353224B (zh) * 2015-09-17 2020-04-24 伯斯有限公司 声学设备
US9794677B2 (en) 2016-01-12 2017-10-17 Bose Corporation Headphone
US9794676B2 (en) 2016-01-12 2017-10-17 Bose Corporation Headphone
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US10477291B2 (en) 2016-07-27 2019-11-12 Bose Corporation Audio device
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Also Published As

Publication number Publication date
JPH11506877A (ja) 1999-06-15
US5682434A (en) 1997-10-28
AU701453B2 (en) 1999-01-28
WO1996041496A1 (fr) 1996-12-19
AU6023496A (en) 1996-12-30
EP0885546A4 (fr) 1999-11-17

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